New Environment Agency maps to show inadequate drainage

The number of homeowner hits by high flood insurance premiums is set to double to 1m as the government releases its first maps of urban areas with inadequate drainage, according to reports.

According to The Sunday Times, the Environment Agency’s new fluvial mapping system, which shows were drains are unable to cope with flash floods, will indicate that a further 500,000 homes are at risk,

At present, half a million homeowners live in areas classified as “high risk” by the EA.

They are penalised with a supplement of up to 30% to their premiums and excesses of as much as £30,000.

The potential threat to 1m homes has been revealed by JBA Consulting, which has worked with the Department for Environment, Food and Rural Affairs and Norwich Union, the insurance company.